<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="简易留言板.css" rel="stylesheet">
</head>
<body>
<div id="Main">
    <span>留言板</span>
    <div id="output"><div id="block"></div></div>
    <div id="input"><textarea id="in"></textarea></div>
    <button id="commit">提交</button>
</div>
<script src="简易留言板.js"></script>
</body>
</html>